Jennifer Lawrence Got Into Epic Catfight After Smoking Weed At Ellen DeGeneres' Party

Immediately, the A-list actress said she "entered a different universe."

"Their s**t is different!" the actress joked about what she had inhaled.

That's when Lawrence recalled going to the porta potty and accidentally interfering with a woman's own restroom needs.

"There was a woman there, and she was like, 'No, no, no, go on, go ahead!' I was like, 'No, you were here first. You go!' And she was like, 'Go!'" Lawrence recalled to Stern.

Lawrence said she then went into the porta potty and convinced herself that the woman waiting outside had to "poop."

"So I came out, and I made a beeline for her and I went up to her and I was like, 'Look, you gotta poop.' And she was like, 'No, I don't. I don't know why you're saying that. I really don't. She was kind of laughing but was like, 'No,'" Lawrence continued to Stern.

The actress said the situation escalated after she unintentionally grabbed the woman "by the shoulders, shaking her, screaming, 'You have to poop! You have to poop!"

Of course, for outspoken stars like Lawrence, security wasn't too concerned. She recalled the guard "laughing so hard" because of the entire conversation.

"He and I were on the ground laughing. The woman just started laughing, and I was like, 'Just…poop," Lawrence said.

Stern, of course, wanted to know who the mystery woman was – and Lawrence said all she knew is that she wasn't famous.

"I have to apologize," Lawrence added.